| Summary: | 碩士 === 國立臺灣海洋大學 === 通訊與導航工程學系 === 106 === Wireless communication system is currently widely used in various applications. Orthogonal frequency-division multiplexing(OFDM) is the most deployed technology. The orthogonality of each subcarrier in the system has the advantage of efficient spectrum efficiency benefit, however it is very sensitive to the Doppler Effect. If the receiver can not complete the time offset and carrier frequency offset synchronization, the received data can not be correctly decoded. In the conventional pilot-based synchronization, it inherits the disadvantage of reduce the usage of data throughput. In this paper, blind synchronization method is proposed. Using the OFDM system to estimate time offset and carrier frequency offset simultaneously. With the blind synchronization method, the inefficient throughput usage of the pilot-based methods can be avoided.
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